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  <span class="item" title="Created: 2021-12-06 15:00:39">
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    <h3><a href="/computer-science/Pwn/pwn2/" itemprop="url" title="pwn学习(2)">pwn学习(2)</a></h3>
    <div class="excerpt">
        # 记录两个堆的比赛题
比较穷网盘没有会员附件私聊我
# pwn1

堆溢出
感觉比较基础
堆溢出改大小制造重叠堆块
from pwn import *#io=process(&#39;./pwn1&#39;)io=remote(&#39;119.61.19.212&#39;,57511)elf=ELF(&#39;./pwn1&#39;)libc=ELF(&#39;./libc-2.31.so&#39;)#libc=elf.libccontext.log_level=&#39;debug&#39;def add(context):	io.sendlineafter(&#39;&gt;&gt;...
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    <h3><a href="/computer-science/Pwn/pwn/" itemprop="url" title="pwn学习(1)">pwn学习(1)</a></h3>
    <div class="excerpt">
        # pwn 学习 1
一张汇编图片

栈帧结构
# Fig 1. 函数调用发生和结束时调用栈的变化
esp 用来存储函数调用栈的栈顶地址，在压栈和退栈时发生变化。ebp 用来存储当前函数状态的基地址，在函数运行时不变，可以用来索引确定函数参数或局部变量的位置。eip 用来存储即将执行的程序指令的地址，cpu 依照 eip 的存储内容读取指令并执行，eip 随之指向相邻的下一条指令，如此反复，程序就得以连续执行指令。
下面让我们来看看发生函数调用时，栈顶函数状态以及上述寄存器的变化。变化的核心任务是将调用函数（caller）的状态保存起来，同时创建被调用函数（callee）的状态

# Fig...
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    <h3><a href="/computer-science/Misc/%E6%AF%94%E8%B5%9Bmisc/" itemprop="url" title="比赛MISC">比赛MISC</a></h3>
    <div class="excerpt">
        2021/10/21 更新了 MISC3 - 眼神要好使，得到的 flag 中的内容请 md5 后上交 - blasting 的附件
# 祥云杯 2021-MISC - 鸣雏恋
算是学习脚本了吧
遍历目录脚本
files = os.listdir(filePath)#遍历文件夹里的图片 for file in files: # 把文件路径和文件名结合起来 file_d = os.path.join(filePath, file) # 判断该文件是单个文件还是文件夹 if os.path.isdir(file_d): # 如果是文件夹则递归调用 scanDir () 函数...
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    <h3><a href="/computer-science/Misc/BUGKUmisc/" itemprop="url" title="bugku-MISC">bugku-MISC</a></h3>
    <div class="excerpt">
        # where_is_flag
下载附件得到 10 个 txt 文件，用 010 打开发现里面全是 00 截断符号

看字节大小，用 py 脚本把每个文件的字节长度跑出来
for n in range(1,11): name = str(n)+&#39;.txt&#39; with open(name) as f: print(len(f.read()),end=&quot;&quot;)
跑出来的字节长度应该是十进制的 ascii 码，尝试对它进行分割，然后跑出来得到 bugku
for n in range(1,11): name = str(n)+&#39;.txt&#39; with...
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    <h3><a href="/accumulate/" itemprop="url" title="accumulate">accumulate</a></h3>
    <div class="excerpt">
        # gif 文件修改大小

gif 修改大小 FF 为 255

一共修改两处
# bmp 修改大小
可以看见

4 个字节代表宽和高 84030000，F3000000
贴爆破 bmp 宽度的脚本
import structimport zlibf = open(&#39;./.bmp&#39;,&#39;rb&#39;)c = f.read()width = c[18:22]height = c[22:26]# 爆破 bmp 宽度for i in range(900,1100): f1 =...
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    <h3><a href="/computer-science/note/theme-shoka-doc/special/" itemprop="url" title="Step.4 主题特殊功能">Step.4 主题特殊功能</a></h3>
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        🚀快速开始 - 💌依赖插件 - 📌基本配置 - 🌈界面显示 - 🦄特殊功能

以下介绍可以使用的 markdown 或者标签代码。
功能大部分基于 hexo-renderer-multi-markdown-it 渲染器，尤其是代码块的显示，与默认渲染器不兼容。

# links 链接块
本功能参考 NexT，基于 Hexo Tag 功能，用来建立友链或其他网址链接功能。
文章中的使用格式：

使用 links 标签块，包围 yml 语法书写的内容，字段包括

site
站点名称
必填

owner
管理员名字
可选，默认为 site...
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    <span>4 mins.</span>
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    <h3><a href="/computer-science/note/theme-shoka-doc/display/" itemprop="url" title="Step.3 界面显示">Step.3 界面显示</a></h3>
    <div class="excerpt">
        🚀快速开始 - 💌依赖插件 - 📌基本配置 - 🌈界面显示 - 🦄特殊功能

# 首页置顶文章
在文章的 Front Matter 设置 sticky: true ，则该文章将显示在首页最上方的 置顶文章 列。
多篇文章按照发布时间倒序排列，不分页。
---title: 置顶文章sticky: true---# 首页精选分类
想要在首页显示分类翻转块，需要按照以下示例的方式，给需要显示的分类加上封面图。

首先，修改站点配置：
找到 category_map: ，配置每个分类对应的英文映射，比如：
category_map: 计算机科学: computer-science Java:...
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    <h3><a href="/computer-science/note/theme-shoka-doc/config/" itemprop="url" title="Step.2 基本配置">Step.2 基本配置</a></h3>
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        🚀快速开始 - 💌依赖插件 - 📌基本配置 - 🌈界面显示 - 🦄特殊功能

# 站点别称
alternate: Yume Shoka这里设置的名称代替 Logo，显示在页面顶部，以及页尾©️处
# 静态文件目录
statics: / #//cdn.jsdelivr.net/gh/amehime/shoka@latest/默认值是 / ，指使用本地静态文件
可以修改成 //cdn.jsdelivr.net/gh/您的github用户名/您的项目名@latest/ 这种形式，以使用 jsDelivr 进行加速。
PS：jsDelivr...
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  <span class="item" title="Created: 2020-08-13 20:46:48">
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    <span>2.6k</span>
    <span class="text">words</span>
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  <span class="item" title="Reading time">
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    <span>2 mins.</span>
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    <h3><a href="/computer-science/note/theme-shoka-doc/dependents/" itemprop="url" title="Step.1 依赖插件">Step.1 依赖插件</a></h3>
    <div class="excerpt">
        🚀快速开始 - 💌依赖插件 - 📌基本配置 - 🌈界面显示 - 🦄特殊功能

请务必将 hexo-renderer-multi-markdown-it 升级到最新版，目前为 0.1.5

Theme Shoka 依赖以下 Hexo 插件

插件名称
npm 地址
功能
依赖程度

hexo-renderer-multi-markdown-it
链接
md 文件渲染器，压缩 css/js/html
必需

hexo-autoprefixer
链接
给生成的 css...
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    <a href="/computer-science/note/theme-shoka-doc/dependents/" itemprop="url" title="Step.1 依赖插件" class="btn">more...</a>
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  <span class="item" title="Created: 2020-04-13 19:12:45">
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</div>

    <h3><a href="/computer-science/java/course-1/week-2/" itemprop="url" title="第2周 判断">第2周 判断</a></h3>
    <div class="excerpt">
        :::note info
以下为个人学习笔记和习题整理
课程：零基础学 Java 语言 - 浙江大学 - 翁恺 @ 中国大学 MOOC
https://www.icourse163.org/course/ZJU-1001541001
:::
# 课堂笔记
# 关系运算

六个关系运算符：

运算符
意义

==
相等

!=
不相等

&amp;gt;
大于

&amp;gt;=
大于或等于

&amp;lt;
小于

&amp;lt;=
小于或等于

关系运算结果为 true 或 false
优先级

所有关系运算符的优先级比算术运算低，但比赋值运算高
判断是否相等的 == 和！=...
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